Security has been stepped up in Nepal after explosions hit two churches and a police station amid ongoing protests against a draft of the country's new constitution being voted on this week.

Home Ministry official Laxmi Dhakal says no one was hurt in the church blasts, which happened around midnight Monday in the eastern town of Jhapa. The protests, however, have left 40 people dead over the past month.

Officials boosted security around religious buildings and key infrastructure after lawmakers rejected demands that secular Nepal again be a Hindu nation.

Another blast occurred Tuesday morning after police brought a homemade explosive device to the station. Three officers were injured.

Nepal's Constituent Assembly is expected to finish voting Thursday on the draft of the long-delayed new constitution.